<template>
  <h2>toRef的使用及特点</h2>
  <h3>state:{{state}}</h3>
  <h3>age:{{age}}</h3>
  <h3>money:{{money}}</h3>
  <hr>
  <button @click="update">更新数据</button>
  <hr>
  <Child :age="age" />
</template>

<script>
import { defineComponent,reactive,toRef,ref } from "vue";
import Child from './components/Child'
export default defineComponent({
  name: "App",
  components:{Child},
  setup() {
    const state = reactive({
      age:5,
      money:100
    })
    const age = toRef(state,'age')
    const money = ref(state.money)
    console.log(age);
    console.log(money);
    const update = ()=>{
      // console.log(111);
      // state.age += 2
      age.value +=3
      // money.value +=10
    }
    return {
      state,
      update,
      age,
      money
    }
  }
});
</script>

<style lang="less" scoped>
</style>
